package com.example.client;

import com.example.handler.NettyClientHandler;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.nio.charset.StandardCharsets;

/*
 *  @author 雨安
 *  类名： NettyClient
 *  创建时间：2024/3/8
 */
public class NettyClient {
    public static void main(String[] args) throws InterruptedException {
        //1.创建线程组
        EventLoopGroup group = new NioEventLoopGroup();
        //2.创建客户端启动助手
        Bootstrap bootstrap = new Bootstrap();
        //3.设置线程组
        bootstrap.group(group)
                .channel(NioSocketChannel.class) //4.设置客户端通道实现为NIO
                .handler(new ChannelInitializer<SocketChannel>() { //5.创建一个通道初始化对象
                    @Override
                    protected void initChannel(SocketChannel socketChannel) throws Exception {
                        socketChannel.pipeline().addLast(new NettyClientHandler());
                    }
                });
        //6.启动客户端 等待连接服务器,同时将异步改为同步
        ChannelFuture channelFuture = bootstrap.connect("127.0.0.1",9999).sync();
        Person person = new Person("1","2");
        //客户端发送数据,借用netty的buffer转化工具
        channelFuture.channel().writeAndFlush(Unpooled.copiedBuffer(person.toString().getBytes(StandardCharsets.UTF_8)));
        //7.关闭通道和连接池
        channelFuture.channel().closeFuture().sync();
        group.shutdownGracefully();
    }
}


@Data
@AllArgsConstructor
@NoArgsConstructor
class Person{
    private String a;

    private String b;
}
